mirror of
https://git.ianrenton.com/ian/spothole.git
synced 2026-08-11 15:11:41 +00:00
51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
import logging
|
|
from datetime import datetime
|
|
|
|
import pytz
|
|
|
|
from core.data_store import DATA_STORE
|
|
|
|
|
|
class SIGRefDataProvider:
|
|
"""Generic SIG reference data provider class. Subclasses of this query the individual URLs or files for data."""
|
|
|
|
def __init__(self, sig_name, provider_config):
|
|
"""Constructor"""
|
|
|
|
self.sig_name = sig_name
|
|
self.enabled = provider_config["enabled"]
|
|
self.last_update_time = datetime.min.replace(tzinfo=pytz.UTC)
|
|
self.status = "Not Started" if self.enabled else "Disabled"
|
|
self.reference_count = 0
|
|
self._stop = False
|
|
|
|
|
|
def start(self):
|
|
"""Start the provider. This should return immediately after spawning threads to access the remote resources"""
|
|
|
|
raise NotImplementedError("Subclasses must implement this method")
|
|
|
|
|
|
def stop(self):
|
|
"""Stop any threads and prepare for application shutdown. Subclasses should implement this method and call
|
|
super()."""
|
|
|
|
self._stop = True
|
|
|
|
def _add_data(self, new_data):
|
|
"""Add all the provided reference data objects to the data store."""
|
|
|
|
# with transact() batches all writes together to save making thousands of individual sqlite writes
|
|
with DATA_STORE.sigrefs.transact():
|
|
for d in new_data:
|
|
DATA_STORE.sigrefs.set(self.sig_name + ":" + d.id, d)
|
|
|
|
# For the big data sources, loading will take a few minutes. If we want to shut down the software neatly
|
|
# within the first few minutes of startup, we need a way to abort this expensive process of filling up the
|
|
# disk cache.
|
|
if self._stop:
|
|
break
|
|
|
|
self.reference_count = len(new_data)
|
|
logging.info(f"Loaded %d references for %s into the data store.", self.reference_count, self.sig_name)
|